BALTIMORE - After you pack your lunch in the morning, state highway officials advise drivers to pack some extra time and patience into their morning commute.

An overnight storm may ring icy conditions to Maryland highways on Friday morning.

"SHA is prepared to respond and treat roads overnight and through Friday morning's rush hour," said SHA Administrator Melinda B. Peters. "The commute could be problematic since the light snow is forecasted to changeover to sleet and freezing rain."

Freezing rain can also bring down trees and power lines. That may result in traffic signal outages.

Motorists are reminded to treat intersections with power outages as a four-way stop sign.